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main: add -q/-Q options to set clock/print offset once and exit

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This commit is contained in:
Miroslav Lichvar 2014-04-09 12:12:12 +02:00
parent c546c48d0d
commit 70feea48f8
3 changed files with 31 additions and 1 deletions
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6
chrony.texi.in
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@ -1026,6 +1026,12 @@ system clock last time the computer was on.
@item -u <user>
When this option is used, chronyd will drop root privileges to the specified
user. So far, it works only on Linux when compiled with capabilities support.
@item -q
When run in this mode, @code{chronyd} will set the system clock once
and exit. It will not detach from the terminal.
@item -Q
This option is similar to `-q', but it will only print the offset and
not correct the clock.
@item -v
This option displays @code{chronyd's} version number to the terminal and
exits.

8
chronyd.8.in
View file

@ -103,6 +103,14 @@ computer was on.
When this option is used, chronyd will drop root privileges to the specified
user. So far, it works only on Linux when compiled with capabilities support.
.TP
.B \-q
When run in this mode, chronyd will set the system clock once
and exit. It will not detach from the terminal.
.TP
.B \-Q
This option is similar to \fB\-q\fR, but it will only print the offset and
not correct the clock.
.TP
.B \-v
This option displays \fBchronyd\fR's version number to the terminal and exits
.TP

18
main.c
View file

@ -148,6 +148,12 @@ post_init_ntp_hook(void *anything)
RTC_StartMeasurements();
RCL_StartRefclocks();
/* Special modes can end only when sources update their reachability.
Give up immediatelly if there are no sources. */
if (ref_mode != REF_ModeNormal && !SRC_ReadNumberOfSources()) {
REF_SetUnsynchronised();
}
}
/* ================================================== */
@ -157,6 +163,8 @@ reference_mode_end(int result)
{
switch (ref_mode) {
case REF_ModeNormal:
case REF_ModeUpdateOnce:
case REF_ModePrintOnce:
exit_status = !result;
SCH_QuitProgram();
break;
@ -363,6 +371,14 @@ int main
debug++;
nofork = 1;
system_log = 0;
} else if (!strcmp("-q", *argv)) {
ref_mode = REF_ModeUpdateOnce;
nofork = 1;
system_log = 0;
} else if (!strcmp("-Q", *argv)) {
ref_mode = REF_ModePrintOnce;
nofork = 1;
system_log = 0;
} else if (!strcmp("-4", *argv)) {
address_family = IPADDR_INET4;
} else if (!strcmp("-6", *argv)) {
@ -455,7 +471,7 @@ int main
/* From now on, it is safe to do finalisation on exit */
initialised = 1;
if (CNF_GetInitSources() > 0) {
if (ref_mode == REF_ModeNormal && CNF_GetInitSources() > 0) {
ref_mode = REF_ModeInitStepSlew;
}